Adjustable level



FIG. 1 is a top, front and right side perspective view of an adjustable level showing my new design, the dotted line showing of a beam is environmental only and forms no part of the claimed design;

FIG. 2 is a front elevational view;

FIG. 3 is a right side elevational view;

FIG. 4 is a rear elevational view;

FIG. 5 is a left side elevational view;

FIG. 6 is a top plan view; and

FIG. 7 is a bottom plan view thereof. 

The ornamental design for an adjustable level, as shown. 